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* This is not actually unreachable, so don't use llvm_unreachable for it. SinceNick Lewycky2011-08-191-1/+2
| | | | | | | | | | | the intent seems to be to terminate even in Release builds, just use abort() directly. If program flow ever reaches a __builtin_unreachable (which llvm_unreachable is #define'd to on newer GCCs) then the program is undefined. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138068 91177308-0d34-0410-b5e6-96231b3b80d8
* Add llc flags to disable machine DCE and CSE.Jakob Stoklund Olesen2011-08-191-2/+8
| | | | | | This is useful for unit tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138028 91177308-0d34-0410-b5e6-96231b3b80d8
* Make a bunch of symbols private.Benjamin Kramer2011-08-192-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138025 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't treat a partial <def,undef> operand as a read.Jakob Stoklund Olesen2011-08-191-1/+2
| | | | | | | | | | | | | | | | | | | | | | | Normally, a partial register def is treated as reading the super-register unless it also defines the full register like this: %vreg110:sub_32bit<def> = COPY %vreg77:sub_32bit, %vreg110<imp-def> This patch also uses the <undef> flag on partial defs to recognize non-reading operands: %vreg110:sub_32bit<def,undef> = COPY %vreg77:sub_32bit This fixes a subtle bug in RegisterCoalescer where LIS->shrinkToUses would treat a coalesced copy as still reading the register, extending the live range artificially. My test case only works when I disable DCE so a dead copy is left for RegisterCoalescer, so I am not including it. <rdar://problem/9967101> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138018 91177308-0d34-0410-b5e6-96231b3b80d8
* add the comments of each declaration follow it, making it easier to read and ↵Renato Golin2011-08-181-49/+44
| | | | | | compare to GCC's result. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138009 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate unnecessary forwarding function.Devang Patel2011-08-183-19/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138006 91177308-0d34-0410-b5e6-96231b3b80d8
* Add new DIE into the map asap.Devang Patel2011-08-181-8/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137998 91177308-0d34-0410-b5e6-96231b3b80d8
* FastISel: avoid function calls between the materialization of the constant ↵Ivan Krasin2011-08-181-5/+20
| | | | | | and its use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137993 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the support in code-gen for the landingpad instruction lowering.Bill Wendling2011-08-172-3/+70
| | | | | | | | | | | The landingpad instruction is lowered into the EXCEPTIONADDR and EHSELECTION SDNodes. The information from the landingpad instruction is harvested by the 'AddLandingPadInfo' function. The new EH uses the current EH scheme in the back-end. This will change once we switch over to the new scheme. (Reviewed by Jakob!) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137880 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert patch. Forgot a dependent commit.Bill Wendling2011-08-171-39/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137875 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the body of 'visitLandingPad'.Bill Wendling2011-08-171-3/+39
| | | | | | | | | This generates the SDNodes for the new exception handling scheme. It takes the two values coming from the landingpad instruction and assigns them to the EXCEPTIONADDR and EHSELECTION nodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137873 91177308-0d34-0410-b5e6-96231b3b80d8
* Modify for the new EH scheme.Bill Wendling2011-08-171-1/+57
| | | | | | | | | Things are much saner now. We no longer need to modify the laning pads, because of the invariants we impose upon them. The only thing DwarfEHPrepare needs to do is convert the 'resume' instruction into a call to '_Unwind_Resume'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137855 91177308-0d34-0410-b5e6-96231b3b80d8
* Until now all debug info MDNodes referred to a root MDNode, a compile unit. ↵Devang Patel2011-08-164-99/+96
| | | | | | | | | | This simplified handling of these needs in dwarf writer. However, one side effect of this is that during link time optimization all these MDNodes are _not_ uniqued. In other words there will be N number of MDNodes describing "int", "char" and all other types, which would suddenly grow when each object file starts using libraries like STL. MDNodes graph structure such that compiler unit keeps track of important MDNodes and update dwarf writer to process mdnodes top-down instead of bottom up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137778 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused Target argument from AsmParser construction methods.Jim Grosbach2011-08-161-1/+1
| | | | | | | The argument is unused, and is a layering violation in any case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137735 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unnecessary version check.Devang Patel2011-08-161-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137728 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r137562 because it caused PR10674Nadav Rotem2011-08-161-7/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137719 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor.Devang Patel2011-08-152-49/+68
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137689 91177308-0d34-0410-b5e6-96231b3b80d8
* Continue to hoist uses of getCompileUnit() up. The goal is to get rid of ↵Devang Patel2011-08-152-21/+24
| | | | | | uses of getCompileUnit(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137683 91177308-0d34-0410-b5e6-96231b3b80d8
* This is somewhat déjà-vu, but avoid using getCompileUnit() as much as ↵Devang Patel2011-08-152-14/+14
| | | | | | possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137668 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor. Variables are part of compile unit so let CompileUnit create new ↵Devang Patel2011-08-154-123/+129
| | | | | | variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137663 91177308-0d34-0410-b5e6-96231b3b80d8
* There is no need to maintain a set to keep track of variables that use ↵Devang Patel2011-08-152-8/+2
| | | | | | location expressions. In such cases, AT_location attribute's value will be a label. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137659 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix warning.Devang Patel2011-08-152-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137658 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify. Let DbgVariable keep track of variable's DBG_VALUE machine ↵Devang Patel2011-08-152-55/+24
| | | | | | instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137656 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify mapping to variable from its abstract variable info.Devang Patel2011-08-152-29/+18
| | | | | | | When a variable is inlined multiple places, abstract variable keeps name, location, type etc.. info and all other concreate instances of the variable directly refers to abstract variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137637 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor.Devang Patel2011-08-152-5/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137632 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor.Devang Patel2011-08-152-15/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137631 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor. Global variables are part of compile unit so let CompileUnit ↵Devang Patel2011-08-153-129/+114
| | | | | | create new global variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137621 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor. A subprogram is part of compile unit so let CompileUnit construct ↵Devang Patel2011-08-154-114/+141
| | | | | | new subprogram. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137618 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR 10635. When generating integer constants, the constant element type mayNadav Rotem2011-08-131-0/+7
| | | | | | | | | be illegal, even if the requested vector type is legal. Testcase is one of the disabled ARM tests in the vector-select patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137562 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial commit of the 'landingpad' instruction.Bill Wendling2011-08-122-0/+4
| | | | | | | | | | | | | This implements the 'landingpad' instruction. It's used to indicate that a basic block is a landing pad. There are several restrictions on its use (see LangRef.html for more detail). These restrictions allow the exception handling code to gather the information it needs in a much more sane way. This patch has the definition, implementation, C interface, parsing, and bitcode support in it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137501 91177308-0d34-0410-b5e6-96231b3b80d8
* Use ArrayRef.Devang Patel2011-08-121-6/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137485 91177308-0d34-0410-b5e6-96231b3b80d8
* switch to use the new api for structtypes.Chris Lattner2011-08-121-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137480 91177308-0d34-0410-b5e6-96231b3b80d8
* Provide fast path as Jakob suggested.Devang Patel2011-08-121-0/+12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137478 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r137310 because it does not optimize any code on ToTNadav Rotem2011-08-121-32/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137466 91177308-0d34-0410-b5e6-96231b3b80d8
* Silence a bunch (but not all) "variable written but not read" warningsDuncan Sands2011-08-126-3/+7
| | | | | | | when building with assertions disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137460 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify the interference checking code a bit.Jakob Stoklund Olesen2011-08-122-112/+42
| | | | | | | This is possible now that we now longer provide an interface to iterate the interference overlaps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137397 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the InterferenceResult class.Jakob Stoklund Olesen2011-08-111-32/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137381 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate the last use of InterferenceResult.Jakob Stoklund Olesen2011-08-112-63/+57
| | | | | | | | The Query class now holds two iterators instead of an InterferenceResult instance. The iterators are used as bookmarks for repeated collectInterferingVRegs calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137380 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove more dead code.Jakob Stoklund Olesen2011-08-112-37/+3
| | | | | | | collectInterferingVRegs will be the primary function for interference checks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137354 91177308-0d34-0410-b5e6-96231b3b80d8
* Privatize an unused part of the LiveIntervalUnion::Query interface.Jakob Stoklund Olesen2011-08-112-19/+13
| | | | | | No clients are iterating over interference overlaps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137350 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some dead code.Jakob Stoklund Olesen2011-08-112-39/+0
| | | | | | | | The InterferenceResult iterator turned out to be less important than we thought it would be. LiveIntervalUnion clients want higher level information, like the list of interfering virtual registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137346 91177308-0d34-0410-b5e6-96231b3b80d8
* Plug a memory leak.Benjamin Kramer2011-08-111-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137321 91177308-0d34-0410-b5e6-96231b3b80d8
* [AVX] When joining two XMM registers into a YMM register, make sure that theNadav Rotem2011-08-111-0/+32
| | | | | | | | | lower XMM register gets in first. This will allow the SUBREG pattern to elliminate the first vector insertion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137310 91177308-0d34-0410-b5e6-96231b3b80d8
* fix PR10605 / rdar://9930964 by adding a pretty scary missed check.Chris Lattner2011-08-111-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | It's somewhat surprising anything works without this. Before we would compile the testcase into: test: # @test movl $4, 8(%rdi) movl 8(%rdi), %eax orl %esi, %eax cmpl $32, %edx movl %eax, -4(%rsp) # 4-byte Spill je .LBB0_2 now we produce: test: # @test movl 8(%rdi), %eax movl $4, 8(%rdi) orl %esi, %eax cmpl $32, %edx movl %eax, -4(%rsp) # 4-byte Spill je .LBB0_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137303 91177308-0d34-0410-b5e6-96231b3b80d8
* Stay within 80 columns.Devang Patel2011-08-102-22/+34
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137283 91177308-0d34-0410-b5e6-96231b3b80d8
* Distinguish between two copies of one inlined variable. Take 2.Devang Patel2011-08-101-3/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137253 91177308-0d34-0410-b5e6-96231b3b80d8
* While extending definition range of a debug variable, consult lexical scopes ↵Devang Patel2011-08-101-10/+22
| | | | | | also. There is no point extending debug variable out side its lexical block. This provides 6x compile time speedup in some cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137250 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert unintentional parts of previous check-in.Devang Patel2011-08-101-5/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137249 91177308-0d34-0410-b5e6-96231b3b80d8
* Start using LexicalScopes utility. No intetional functionality change.Devang Patel2011-08-102-526/+113
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137246 91177308-0d34-0410-b5e6-96231b3b80d8
* Provide utility to extract and use lexical scoping information from machine ↵Devang Patel2011-08-102-0/+306
| | | | | | instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137237 91177308-0d34-0410-b5e6-96231b3b80d8
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